Research points dont go to the researching Vehicle

So i was researching the Me262(7.0) and i played SIM Air with my Tornado(11.0). After the match ended i got 39k research points but at the same time only 4k research points. only 4k research points went to that vehicle im researching. I was playing the battle for more than 2 hours. only for 4k rp? Am i doing something wrong or is it just war thunder?

It’s a game mechanic. Because you are researching a vehicle 3 ranks below the one you are using you only get 10% of your earned research applied to that vehicle.

ok thx